Magnetic field characteristics evaluation apparatus and magnetic field characteristics measuring method
US6437562B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Mar 8, 2001 |
| Grant date | Aug 20, 2002 |
| Priority date | — |
| Expiry date | Mar 8, 2021 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S977/865
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
There is disclosed a magnetic field characteristics evaluation apparatus for turning off a switching signal, measuring the surface of a magnetic field generating member in a magnetized state by AFM, and storing AFM signal together with a position signal corresponding to a scanning position in a memory to display a surface configuration based on the AFM signal. Subsequently, the switching signal is turned on, the magnetic head is set to a magnetized state, the AFM signal is referred to, the magnetic head surface is measured by MFM, and MFM signal together with the position signal corresponding to the scanning position are stored in the memory to display a surface magnetic field distribution based on the MFM signal. Therefore, it is possible to accurately specify, from the surface, a position in which the magnetic field is generated.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.